Recent content by likephysics

I was trying to figure out the equivalent circuit starting from R3 to the load R2. Let's say R2=100 and T2=50, then the part from R3 would reduce to Voltage source of 0.33V with series res of 25 ohm and a T line of 50 ohm? The 25 doesn't make sense. Since R3=T2, this series res would be 0...

Trying to work out the match for a transmission line with 2x termination. Like the one here: https://ibb.co/p4dY7pF V1=1 R1=R2=T1=T2=50, V1 sees R1 and T1. So it is divided to half. Now you have 0.5V source with a 50 Ohms series impedance(T1) looking into a load that is a parallel combo of...

I have attached a ckt to make it clear. Assume gate threshold is 1v. In the fig, if Source (Low side) is 0V, then Vgs > Vth, FET is ON. Let's say Source is 3.3V, Gate is 3.3V and Drain goes from 3.3V to 0V. At what drain Voltage does the FET turn ON? What is the turn on sequence. Does the body...

When does an N-ch Mosfet conduct when drain voltage varies from 0V to Vdd(like 5V). In case of Source voltage changing between 0V to 5V, all you do is check if VGS > Vth, with Vdrain fixed at 5V. But in case of Drain Voltage changing between 0V to 5V, how does it work?

How does the load capacitance affect the Crystal. For example, IC manufacturers recommend a Crystal and also load capacitance, like 25MHZ, 16pF. What happens if I choose a xtal with load cap of 10pF 25MHz? I am talking about changing the load caps recommended by IC manufacturer, not the ones in...

So if I terminate a 50 ohm source with a parallel 50 ohm followed by a matched tline and load. The load will see half the voltage, right?

You read it right. why doesn't the half power dissipation happen when the 50 ohm tline is terminated by 50 ohm load. Let's say we have a 1V source with 50 ohm source impedance driving a 50 ohm tline. The voltage on the tline would be 0.5V. Now if the tline is terminated by 50 ohm load, the...

I am a bit confused on source impedance and Tline impedance, when both are equal. Let's say source impedance is 50 ohms and Tline imepdance is also 50 ohms. Why does the incident wave divide between the source impedance and tline impedance. The impedance is same, so reflection co-efficient...

Is the pottery kiln have an inductive element? As you mentioned you could try using a RCD or just a RC snubber. Why can't the Fujitsu Micro drive SSDs. There are SSDs available down from 3.3VDC to 220VAC

Gordo, What exactly do you mean by pitting the contacts?

What are the conditions when a ESD discharge occurs, in particular while handling components and assembled units. Can someone explain ESD discharge in the following cases - Let's say you are handling an IC, moving it around for soldering etc. What is the chance of the handler zapping the IC and...

Is the ESD standard different for components(ICs) and systems. For Systems the standard I refer is IEC61000-4-2. For ICs, I am not sure. Does HBM and CDM apply to only components or does it apply to systems too? Is the Automotive ESD testing levels different than the industrial ones( 4KV...

I have a strange problem. We test our components in oil in a hot chamber(60-100C). Wires are bought out of the chamber for power supply and data acquisition. The oil from the chamber leaks on to the wires because of heat and capillary action. This makes the wires oily and working with oily wire...

I understand 25G itself if very high. Can I make the same statement when the magnitude is 25Grms?

I need to something to relate the vibrations (Grms) to everyday life. How can I explain how much 25Grms is. Is it similar to vibrations you experience during a take off or is it similar to vibrations you feel during a Mag 4 Earth quake?